We’ve observed that several websites either take a long time to load or fail to load entirely when Netskope is enabled. However, the same sites work smoothly once Netskope is disabled. Since the issue is intermittent and not easily reproducible, identifying the root cause has been challenging.

A recent example involved LinkedIn Sales Navigator, where some users reported the site not loading. Upon analyzing HAR logs, we noticed that the licdn.com domain was significantly delayed when Netskope was active.

We tested a couple of solutions, both of which proved effective for different user sets:

• Implemented an SSL Do Not Decrypt (DND) rule for the licdn.com domain

• Assigned a client configuration policy with MTU set to 1494 for affected users

We’ve encountered similar issues with other services such as AWS S3, MoveInSync, and Box Notes (for box we have identified boxcdn  domain that is taking time).

How can we systematically troubleshoot and resolve such issues where Netskope inspection intermittently causes performance degradation or failures across various applications?